\begin{table}

\caption{}
\centering
\begin{tabular}[t]{lrrrrrr}
\toprule
\multicolumn{1}{c}{ } & \multicolumn{2}{c}{Dropout Treatment Instructions (N=358)} & \multicolumn{2}{c}{Enrolled in Experiment (N=773)} & \multicolumn{2}{c}{ } \\
\cmidrule(l{3pt}r{3pt}){2-3} \cmidrule(l{3pt}r{3pt}){4-5}
  & Mean & Std. Dev. & Mean & Std. Dev. & Diff. in Means & p\\
\midrule
Age & 2.81 & 1.24 & 2.28 & 0.93 & -0.54 & <0.01\\
Gender & 1.34 & 0.47 & 1.29 & 0.46 & -0.04 & 0.15\\
Education & 4.57 & 1.08 & 4.63 & 1.01 & 0.06 & 0.39\\
Interest in Politics & 2.71 & 0.74 & 2.82 & 0.75 & 0.12 & 0.01\\
Ideology Self & 5.60 & 3.49 & 5.33 & 3.21 & -0.27 & 0.22\\
Polarization Candidates & 6.62 & 3.38 & 6.74 & 3.46 & 0.12 & 0.59\\
WP:Daily time & 6.77 & 1.40 & 6.85 & 1.32 & 0.08 & 0.36\\
WP:Frequency Politics & 4.66 & 2.13 & 4.42 & 2.12 & -0.24 & 0.09\\
WP:Frequency News & 3.26 & 1.96 & 3.31 & 1.98 & 0.05 & 0.69\\
WP:Frequency Family & 1.93 & 1.03 & 1.87 & 0.91 & -0.06 & 0.35\\
WP:Frequency Images about Politics & 3.73 & 2.01 & 3.70 & 1.93 & -0.04 & 0.76\\
N Active Social Media Apps & 3.47 & 1.37 & 3.94 & 1.29 & 0.47 & <0.01\\
Duration Pre-treatment & 13.48 & 60.27 & 18.64 & 210.39 & 5.15 & 0.53\\
Omnibus Test: & F-Statistics = 6.91, p-values < 0.01 &  &  &  &  & \\
\bottomrule
\end{tabular}
\end{table}
